高能多脉冲超平衡射孔技术及其应用

TECHNOLOGY AND APPLICATION OF HIGH ENERGY MULTIPLE PULSE OVER-BALANCED PERFORATING

高能多脉冲超平衡射孔技术利用高能燃料的燃烧 ,在目的层产生 1.2～ 1.5倍于地层破裂压力的高压后开始射孔 ,随后压力补给弹燃烧补给压力 ,对射孔孔眼进行冲刷和延伸、并产生不受地应力控制的裂缝的射孔或增产新技术。文章介绍了该技术的基本原理和装置的结构设计 ,并给出了该技术在中原油田一些气田的应用实例。应用表明 ,该技术具有氮气加压式超平衡射孔的优点 :简便、成本低、增产明显 ,2 0口井平均增产 3.5倍。

High energy multiple pulse perforating uses burning of high-energy fuel to produce pressure 1.2 ～ 1.5 times higher than the formation breaking pressure before beginning to perforate. Then the compensating bullet burns to add pressure to extend and erode the perforated tunnels,and produce fractures uncontrolled by the earth stress. The article introduces the basic principle of the technology and the structural design of the facilities,and provides some real cases using the technology in Zhongyuan oil field. Its application shows the technology has the advantages of over-balanced perforating with nitrogen boosting,easy operation,low cost,and obvious production increasing. According to the statistics of 20 wells,the average production increases 3.5 times.